How to setup a listview first element pressed in a navigationview?

Question

I have checked the Navigation drawer: How do I set the selected item at startup? post. In that post the navigation drawer has a menuview, and my navigation drawer has a listview.

I have a navigation drawer, and a list init. I have setup my list whenever an item chosen, the item gets in a pressed state and highlights the chosen list item. This function works well and looks as following.

activityBinding.list.setOnItemClickListener((parent, view, position, id) -> {
                parent.getChildAt(position).setPressed(true);
});

I have an xml, which is set on the listviev textcolor attribute. The xml looks like that:

<item android:state_pressed="true"
    android:color="#ffffffff"/> 
<item android:state_focused="true"
    android:color="#ff0000ff"/> 
<item android:color="#00000000"/>

However I would like to setup the first item of the list pressed as default, before opening the drawer. My question is: How to get to an item of a list an set it to pressed outside of the setOnItemListener?

If would help if you can post the XML layout and Java code that you have worked till now. Otherwise this is very vague. — Anurag, Feb 25 '17 at 14:18
Possible duplicate of [Navigation drawer: How do I set the selected item at startup?](http://stackoverflow.com/questions/31233279/navigation-drawer-how-do-i-set-the-selected-item-at-startup) — Divers, Feb 25 '17 at 14:55
@Divers I have seen that post, I have a list in my navigation drawer and not a menu. — XXX, Feb 25 '17 at 14:57

score 0 · Answer 1 · answered Feb 25 '17 at 15:03

0

activityBinding.list.getChildAt(0).setPressed(true)

But you should use NavigationView and not ListView.

answered Feb 25 '17 at 15:03

Divers

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I have tried that and I get a nullpointer exception: Attempt to invoke virtual method 'void android.view.View.setPressed(boolean)' on a null object reference. I also followed: https://developer.android.com/training/implementing-navigation/nav-drawer.html, which has a listview in the navigationdrawer. – XXX Feb 25 '17 at 15:09
Then please fix it as explained there - http://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it . That problem is not related to your question. – Divers Feb 25 '17 at 15:11
I found the solution which detailed above. Thanks for your help. – XXX Feb 25 '17 at 16:22

score -1 · Answer 2 · answered Feb 25 '17 at 16:21

I found a solution for my problem.

activityBinding.list.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

            @Override
            public void onGlobalLayout() {
                activityBinding.list.getChildAt(0).setPressed(true);
                activityBinding.list.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            }
        });

How to setup a listview first element pressed in a navigationview?

2 Answers2